:root {
  color-scheme: dark;
  --bg: #020202;
  --panel: rgba(7, 7, 7, 0.84);
  --line: rgba(255, 255, 255, 0.08);
  --text: #f2f2f2;
  --muted: #a8a8a8;
  --accent: #f6f6f6;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.06), transparent 28%),
    radial-gradient(circle at bottom, rgba(38, 73, 170, 0.08), transparent 22%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  overflow: hidden;
}

body {
  position: relative;
}

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}

.hud {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 1;
  width: min(360px, calc(100vw - 36px));
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
}

.settings-panel {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 1;
  width: min(320px, calc(100vw - 36px));
  max-height: calc(100vh - 36px);
  padding: 14px 16px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
}

.title h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.title p,
.controls p,
.hint {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.4;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.stat {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.label {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stat strong {
  display: block;
  margin-top: 5px;
  font-size: 1rem;
}

.ranking {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.ranking h2 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rank-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.88rem;
}

.rank-row + .rank-row {
  margin-top: 6px;
}

.rank-row strong {
  color: var(--text);
  white-space: nowrap;
}

.pause-fab {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 0;
  background: rgba(8, 8, 8, 0.78);
  backdrop-filter: blur(10px);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.pause-fab:disabled {
  cursor: not-allowed;
  opacity: 0;
  pointer-events: none;
}

.controls {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.controls span {
  color: var(--accent);
}

.tuning {
  color: var(--muted);
}

.tuning summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tuning label {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
  align-items: center;
  margin-top: 10px;
  font-size: 0.86rem;
}

.tuning label span {
  color: var(--muted);
}

.tuning label strong {
  color: var(--text);
  font-size: 0.82rem;
}

.tuning input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: #f5d547;
}

.tuning label.toggle {
  grid-template-columns: 1fr auto;
}

.tuning input[type="checkbox"] {
  grid-column: auto;
  width: auto;
  justify-self: end;
}

kbd {
  display: inline-block;
  min-width: 1.8em;
  padding: 2px 6px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom-width: 2px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font: inherit;
  text-align: center;
}

.hint {
  margin-top: 14px;
}

@media (max-width: 720px) {
  .hud {
    top: 10px;
    left: 10px;
    width: min(320px, calc(100vw - 20px));
    max-height: 42vh;
    padding: 10px 12px;
    overflow: auto;
    border-radius: 15px;
  }

  .title h1 {
    font-size: 1.28rem;
  }

  .title p,
  .ranking,
  .controls {
    display: none;
  }

  .stats {
    gap: 8px;
    margin-top: 10px;
  }

  .stat {
    padding: 8px 10px;
  }

  .pause-fab {
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    font-size: 0.74rem;
  }

  .hint {
    margin-top: 9px;
    font-size: 0.84rem;
  }

  .settings-panel {
    top: auto;
    right: 10px;
    bottom: 10px;
    left: 10px;
    width: auto;
    max-height: 34vh;
    padding: 8px 10px;
    border-radius: 14px;
  }

  .tuning summary {
    font-size: 0.78rem;
  }

  .tuning label {
    margin-top: 8px;
    font-size: 0.8rem;
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  .hud {
    width: min(310px, 48vw);
    max-height: 33vh;
    padding: 8px 10px;
    border-radius: 13px;
  }

  .title h1 {
    font-size: 1.12rem;
  }

  .title p,
  .ranking,
  .controls,
  .hint {
    display: none;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 8px;
  }

  .stat {
    padding: 7px 9px;
    border-radius: 10px;
  }

  .label {
    font-size: 0.64rem;
  }

  .stat strong {
    margin-top: 3px;
    font-size: 0.88rem;
  }

  .settings-panel {
    max-height: 28vh;
    padding: 7px 9px;
  }

  .tuning label {
    margin-top: 6px;
    font-size: 0.74rem;
  }
}